<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
	</body>
	<script type="text/javascript">
//	如果属性不直接存在于对象中也不在原型链上
		console.log(Object.prototype)
		var obj={}
		obj.a="a";
		console.log(obj.a)
		
		var result =Object.getOwnPropertyDescriptor(obj,"a");
		console.log(result);
	</script>
</html>
